The Rolls MX42 is a four channel stereo passive (requiring no power) mixer. The unit mixes up to four stereo RCA signals such as CD or cassette players with VCR units, even computer sound cards or MP3 players. All signals are mixed via stereo 100K ohm potentiomenters to stereo RCA output connectors. Features: 4 Stereo RCA inputs Passive, the unit requires no power. Specifications: Input Impedance: 10K to 47K Ohms Output Impedance: 2.5K to 10K Ohms Gain: -12 dB MAX Dimensions:...